Below is an equation that is not correct yet. By adding a number of plus signs and minus signs between the digits on the left side (without changes the order of the digits), the equation can be made correct.

123456789 = 100

The Question: How many different ways are there to make the equation correct?

2
i have 10 possible combinations. a systematic approach gives that many. If i can answer for question in the answer box, i will. Have an answer deleted.
123 - 45 - 67 + 89 =100
123 + 45 -67 + 8 - 9 = 100
1 + 2 - 3 + 4 + 5 + 6 + 78 + 9 = 100
there are more

Answers

2014-08-03T07:36:57+05:30
The answer might be
123-45-67+89=100
0
2014-08-03T10:41:46+05:30
123 - 45 - 67 + 89 = 100 
78 + 9 + 6 + 5 + 4 − 3 + 2 −1 = 100

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